Can I connect LED and SSR to one PIN?

Siri

I am wondering whether I can drive an LED(2.1v- 25mA) and a SSR(Crydom - DMO063 - specs - attached).

I do not have an extra prop pin and I like to know when the relay was activated so as far I can see if I do not exceed the permissible
current capability but at the same time I wan't to be sure before I damage the DIP Prop (which are in shortage at present).

Thanks,

Siri

kwinn

Your SSR calls for a typical input current of 20mA, and your led needs 25mA for a total of 45mA The prop pins are rated for 30mA so the answer is No.
However if you use a high efficiency led it typically needs less than 5mA so the total would be 25mA max, and the answer would be YES.

Post Edited (kwinn) : 11/29/2009 3:36:01 PM GMT

Siri

kwinn,

Thanks for explaniing that.

Siri

Leon

Some SSRs include an LED which shows the status of the device.

Leon

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Amateur radio callsign: G1HSM

photomankc

Here's a driver circuit I made when I needed to drive both an SSR and a cheap indicator LED I had on hand. I had to end up tying it to the 5V rail when the blue LED for the 'cool' control needed 3.0V forward voltage just to turn on.

The prop drives the base of the transistors and the transistors sink the voltage/current for both the LED and the SSR.·· The transistors are just some Radio Shack small signal·NPNs I had on hand.

Post Edited (photomankc) : 11/29/2009 5:19:44 PM GMT